Move the key to the MAR position , it is not necessary to start the engine
Wait for the indication on the instrument panel to switch off before moving the vehicle. The indication may stay on for a few seconds to approximately half a minute.
If the engine is started and the vehicle is moved, the indication will remain on for longer. This will not compromise engine operation;
The above is copied from the manual , explaining what to do post filling with ad blue , what is meant by the indication on the instrument panel switching off ? Cheers .